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<a href="https://github.com/tarantool/tarantool/commit/<a class=hub.com/tarantool/tarantool/commit/047ee8450a81a7bcc910af0e16fafde200b3e80f">047ee8450<a href="https://github.com/tarantool/tarantool/commit/047ee8450a81a7bcc910af0e16fafde200b3e80f">&quot;&gt;test: use unix sockets for iproto connections

Enabled use_unix_sockets_iproto option to use unix sockets
iproto provides the new way to handle the problem with
&amp;#39;Address already in use&amp;#39; error. It lets test-run appoint
unix sockets for LISTEN environment variable values.

Before this change the TcpPortDispatcher was used to
eliminate the race condition when two workers trying to use
the same port: the idea was that each worker used its own
ports range. Really these ports could race with client ports
(from, say, net.box or replication), which typically didn&amp;#39;t
use bind() and so bound to a random available port (despite
any dispatched ranges) and could produce &amp;#39;Address already in
use&amp;#39; error.

Closes: #4008

(cherry picked from commit </a><a class="double-link" href="https://github.com/tarantool/tarantool/commit/<a class="double-link" href="https://github.com/tarantool/tarantool/commit/60f84cbfca24e3a91cea067c923e006b44ee589f">60f84cbfc</a>">60f84cbfc</a><a href="https://github.com/tarantool/tarantool/commit/047ee8450a81a7bcc910af0e16fafde200b3e80f">)

41572 of 50415 relevant lines covered (82.46%)

838164.65 hits per line